State whether the collection is well-defined or not well-defined.
{5, . . . }
A)Well-defined
B)Not well-defined

Question

Quizplus · Accepted Answer

The collection {5, ...} is not well-defined because the ellipsis (...) implies that there are infinitely many numbers between 5 and some unknown upper bound, which is not specified. Therefore, there is no clear way to determine which numbers are included in the collection and which are not. The given set includes only one element, 5, and proceeds with an ellipsis indicating that the set continues with an infinite number of elements. However, it does not specify any rule or pattern for the elements that follow 5. Therefore, the collection is not well-defined.

State Whether the Collection Is Well-Defined or Not Well-Defined